Diagnosis (Normal Mode)

INSPECT DIAGNOSIS (Normal Mode)




a. Check the MIL.

1. The MIL comes on when the ignition switch is turned ON and the engine is not running.

HINT: If the MIL does not light up, troubleshoot the combination meter.

2. When the engine started, the MIL should go off. If the lamp remains on, the diagnosis system has detected a malfunction or abnormality in the system.

b. Check the DTC.

NOTE:
- If there is no DTC in normal mode, check the 1st trip DTC using the continuous Test Results function (Mode 7 for SAE J1979) on the OBD II scan tool or the hand-held tester.
- Hand-held tester only:
When the diagnosis system is switched from normal mode to check mode, it erases all DTCs and freezed frame data recorded in normal mode. So before switching modes, always check the DTCs and freezed frame data, and note them down.

1. Prepare the OBD II scan tool (complying with SAE J1978) or the hand-held tester.
2. Connect the OBD II scan tool or the hand-held tester to DLC3 under the instrument panel lower pad.
3. Turn the ignition switch ON and turn the OBD II scan tool or the hand-held tester switch ON.
4. Use the OBD II scan tool or the hand-held tester to check the DTCs and freezed frame data, note them down (For operating instructions, see the OBD II scan tool's instruction book.).

If there is no DTC in the normal mode, check the 1st trip DTC using the continuous Test Results function (Mode 7 for SAE J1979) or the OBD II scan tool or the hand-held tester.

5. See Trouble Code Descriptions to confirm the details of the DTCs.

NOTE:
When simulating symptoms with an OBD II scan tool (excluding the hand-held tester) to check the DTCs, use normal mode. For code on the DTC chart subject to "2 trip detection logic", perform either of the actions.
- Turn the ignition switch OFF after the symptom is simulated the 1st time. Then repeat the simulation process again. When the problem has been simulated twice, the MIL lights up and the DTCs are recorded in the ECM.
- Check the 1st trip DTC using Mode 7 (Continuous Test Results) for SAE J1979.

c. Clear the DTC.
The DTC and freezed frame data will be erased by either action.
1. Operating the OBD II scan tool (complying with SAE J1998) or the hand-held tester to erase the codes.
2. Disconnecting the battery terminals or EFI fuse.

NOTE: If the hand-held tester switches the ECM from normal mode to check mode or vise-verse, or if the ignition switch is turned from ON to ACC or OFF during check mode, the DTCs and freezed frame data will be erased.